FIG. 35.

Possible role of SSA repair in a better utilization of λ DNA during packaging. This scheme is an illustration of step 11 in Fig. 34. Products of the late DNA replication (linear concatemeric pieces) are represented by double lines; small open circles indicate λ exo degrading the 5′-ending strands. Genome equivalents in the λ DNA concatemers are indicated by the short vertical lines. A packageable genome would be bracketed by two intact vertical lines. Thus, from the two initial DNA pieces (top), two phage genomes could be packaged, while the product of SSA repair (bottom) contains three packageable genome equivalents.